I dont think it is a challenge it is an aid I have found. I read somewhere last year where some people have tried this and it improved their hitting slightly. Like others have said it clears the screen a bit and you can still see the feed back after your swing. Because honestly none of us have time to line up the pci with the ball as it is coming. So you will essentially find yourself swinging the exact same way with it on or off but you will now have a clearer view. It is worth a shot.